Regarding speed of light in vacuum is approximately, which option is correct?

Type: MCQ • Marks: 1

A. 3 × 10^6 m/s

B. 3 × 10^8 m/s

C. 3 × 10^4 m/s

D. 3 × 10^10 m/s

Explanation

Light travels in vacuum at approximately 300 million metres per second.

UPSC Principal & Vice Principal GK/GS

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